Special ring retainer design, sensitively optical mouse , facile shape design, you can type with this mouse.
特殊的手指扣环设计, 灵敏的光电鼠标, 灵巧的外型设计, 戴上同时可以打字.
In this paper, R-α-phenylethylamine and S-α-phenylethylamine are prepared with a type of facile reagent called R (-) TTCA by chemical derivation.
本文主要从化学衍生法着手,研究一种易得的手性试剂R(-)TTCA来制备R-和S-α-苯乙胺。
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